39 results about "Oscillator system" patented technology

The invention provides a crystal oscillator monitoring method and system based on a multi-sensor network. The method comprises the following steps: acquiring operation environment data of the quartz crystal oscillator, monitoring an output signal of the quartz crystal oscillator, and acquiring output frequency and time for measuring the crystal oscillator in each batch; calculating the daily frequency change rate of the quartz crystal oscillator, and establishing an aging linear regression equation of the quartz crystal oscillator through a least square method based on the operation environment data, the output frequency, the daily frequency change rate and the time; and predicting an output frequency prediction value of the quartz crystal oscillator based on the aging linear regression equation, and performing frequency compensation on the quartz crystal oscillator according to the difference between the output frequency prediction value and a target frequency prediction value. Through the method and the corresponding system, the frequency stability and the anti-interference capability of long-term operation of the quartz crystal oscillator system and the overall operation reliability of the terminal equipment can be greatly improved.

The invention provides a transcendental extreme ultraviolet light source device which comprises a free electron laser main body which comprises an undulator system and an optical resonant cavity. The undulator system comprises a modulation section undulator and a radiation section undulator; the optical resonant cavity comprises resonant cavity reflectors and a dispersion section, and the modulation section undulator, the dispersion section undulator and the radiation section undulator are sequentially arranged in the direction of an electron beam and are all located between the resonant cavity reflectors; the resonant wavelength output by the radiation section undulator is 1 / h of the resonant wavelength of the modulation section undulator, h is the harmonic number, and when the resonant wavelength output by the radiation section undulator is 6-7nm, the radiation wavelength reflected by the resonant cavity is h times of the resonant wavelength output by the radiation section undulator, so that the resonant cavity is prevented from adopting a reflector with the reflection wavelength of 6-7nm. According to the device, the radiation of the target wavelength is output by using harmonic waves, and a reflector with relatively long wavelength and mature technology can be directly used; various accelerators are compatible, the energy efficiency of the accelerators is greatly improved, and power consumption is reduced.

The invention relates to the technical field of intelligent control, and discloses a hip joint exoskeleton control method and system based on gait mode prediction and gait phase estimation, a terminal and a storage medium, and the method comprises the steps: constructing and training an initial unsupervised terrain detection model, and obtaining a target unsupervised terrain detection model; inputting the environment binary image into a target unsupervised terrain detection model to obtain a terrain detection result, and obtaining a gait mode prediction result based on a majority voting strategy; according to the hip joint angular velocity, target gait phase estimation is obtained based on a self-adaptive oscillator system; on the basis of the expected auxiliary torque curve, net auxiliary torque is obtained according to the gait mode prediction result and target gait phase estimation, and hip joint exoskeleton assistance modes are switched according to the net auxiliary torque. According to the method, marking of a large amount of data is avoided through the unsupervised terrain detection model, terrain detection and exoskeleton control are combined, and the terrain self-adaptive walking capacity of the exoskeleton is enhanced.

The application relates to the technical field of intelligent control, and discloses a hip exoskeleton control method and system based on gait pattern prediction and gait phase estimation, a terminal and a storage medium, the method comprising the following steps: constructing an initial unsupervised terrain detection model and training the model to obtain a target unsupervised terrain detection model; inputting an environment binary image into the target unsupervised terrain detection model to obtain a terrain detection result, and obtaining a gait pattern prediction result based on a majority voting strategy; obtaining a target gait phase estimation based on an adaptive oscillator system according to a hip joint angular velocity; obtaining a net auxiliary torque based on an expected auxiliary torque curve, a gait pattern prediction result and the target gait phase estimation, and switching a hip exoskeleton assistance mode according to the net auxiliary torque. The unsupervised terrain detection model avoids labeling a large amount of data, the terrain detection is combined with the exoskeleton control, and the terrain self-adaptive walking capability of the exoskeleton is enhanced.

In one example, an RF oscillator system includes a laser source configured to emit laser light, a housing, a crystalline microresonator disposed within the housing, and a photonic integrated circuit disposed within the housing, the photonic integrated circuit including an optical waveguide network and configured to generate a clock signal based on the laser light. The RF oscillator system may further include at least one photonic wirebond configured to couple the laser light between the optical waveguide network and the crystalline microresonator via evanescent coupling; laser control circuitry disposed within the housing and configured to lock a frequency of the laser light to a resonance of the microresonator to generate the clock signal; and a direct digital synthesizer disposed within the housing and configured to produce a tunable oscillator signal based on the clock signal.

The invention belongs to the technical field of vibration reduction control of high-rise structures such as power transmission towers, and particularly relates to a tuned mass damper with eddy current and particle damping and adjustable frequency damping. Comprising a mass block, a compression spring, a guide rod, a linear bearing, a copper plate, a back plate, a rubber gasket, a first countersunk head screw assembly, a first permanent magnet set, a second countersunk head screw, a cover type nut, a shell cover plate, a shell, a sealing plate, a sealing ring, a steel pipe, a hoop assembly, a hexagon bolt assembly, a silicon steel sheet and a second permanent magnet set. The mass block is a rectangular thick plate, and the compression springs are arranged on the upper and lower surfaces to form an oscillator system. Copper balls and permanent magnets are additionally arranged on the basis of common eddy current damping to form a second damping system, eddy current damping and particle damping are combined, and the vibration reduction effect is better; under the same appearance size, damping and frequency are adjustable, the vibration reduction requirements of steel pipes at different positions of a power transmission tower are met, parts can be machined in batches during production, the damping ratio and frequency can be debugged on site, the vibration reduction requirements of different objects are met, and the project execution time is saved.

Systems and methods for computer-assisted design of an inductor are described. Target specifications for an inductor are received. An inductor design is generated segment-by-segment using a reinforcement learning agent to generate segment parameters for each added segment. The reinforcement learning agent implements a policy that is learned using a reward computed based on performance of the generated inductor design relative to the target specifications. The generated inductor design is outputted as a candidate inductor design after determining that the generated inductor design satisfies a predefined performance threshold.

This invention discloses a method for achieving phase-frequency synchronization based on a coupled neuron oscillator system. First, a cross-frequency nonlinear coupling model is constructed by establishing a two-connection structure based on exogenous input and local interaction in the Poincaré model. By introducing nonlinear coupling, phase-frequency synchronization of the coupled neuron oscillators is achieved. Spectral analysis is then used to determine the effect of the coupling strength between low-frequency and high-frequency neurons on phase-frequency synchronization. Theoretical analysis is then used to determine the influence of the low-frequency oscillation phase on the high-frequency oscillation frequency and its mechanism.

The invention discloses a method for analyzing time-frequency characteristics of collision vibration by using a segmented B-spline wavelet collocation method, which comprises the following steps of: (1) establishing a dynamic equation for wavelet discretization, discretizing a dynamic control equation of a collision-vibrator system by using a 4-order B-spline wavelet basis function, and establishing a nonlinear algebraic equation set about a wavelet coefficient; (2) carrying out segmented iterative solution on the time domain, dividing the whole time domain into a plurality of sub-time periods which are connected in sequence, and carrying out iterative solution on the nonlinear algebraic equation set in each sub-time period to obtain a global wavelet coefficient; and (3) analyzing the time-frequency characteristics, and directly calculating energy distribution based on the wavelet coefficient to realize time-frequency joint characterization. The invention aims to provide a method which can fuse solution of system response and extraction of time-frequency characteristics in a unified mathematical framework, and realizes high-precision time-frequency joint characterization by directly solving wavelet coefficients, thereby overcoming inherent defects of an existing two-step method.

Disclosed is a quartz oscillator system comprising: a quartz oscillator comprising a quartz crystal and an oscillator circuit whose frequency is based on a resonant frequency of the quartz crystal; a monitoring module for monitoring an output frequency of the quartz oscillator; a control system external to the quartz oscillator, and configured to compare the output frequency with a setpoint frequency, and apply an adjustment signal to an electronic circuit of the quartz oscillator to adjust a frequency of the quartz oscillator based on the comparison with the reference frequency.

An automated robotic device for coating application comprising an anchoring robot having magnetic tracks, a winding system and an electrical panel, an end effector robot with a set of active omnidirectional wheels, a set of passive omnidirectional wheels, an oscillator system with linear motor and an anchoring point, in which the oscillator system with linear motor moves a tool for applying the coating and a coupling between the anchoring robot and the end effector robot.

The application discloses a double-potential well spring oscillator system experimental device and method. A gas cushion guide rail and a non-inertial reference system motion module are arranged on a horizontal bottom plate, a sliding block is slidably arranged on the gas cushion guide rail, and an adjustable spring fixing support is arranged perpendicularly to the direction of the gas cushion guide rail. The adjustable spring fixing support is connected to the horizontal limiting tension and compression spring module and the gas cushion guide rail through the gas cushion guide rail, and the adjustable spring fixing support is provided with a visual module. A digital display push-pull force gauge is further arranged above the gas cushion guide rail, and the detection end of the digital display push-pull force gauge is connected to the sliding block. The method comprises a quasi-static mode, a dynamic mode and a chaotic mode, the movement between the adjustable spring fixing support and the sliding block is adjusted, the sliding block is adjusted to have different friction on the gas cushion guide rail, different experimental test modes are generated, and experimental simulation is realized. The application comprehensively and accurately displays various nonlinear dynamic phenomena of the spring oscillator in the double-potential well system, provides rich experimental content and a powerful tool for college physics experimental teaching, and has a wide application prospect.

A system and a method for voltage-controlled oscillator (VCO are disclosed. A first VCO core includes a first cross-coupled (CC) transistor pair having a first conductivity type and a second cross-coupled transistor pair having a second conductivity type. A second VCO core includes a third CC transistor pair having the first conductivity type and a fourth CC transistor pair having the second conductivity type. A first synchronization trace connects the first CC transistor pair to the third CC transistor pair. A second synchronization trace connects the second CC transistor pair to the fourth CC transistor pair. The first and second VCO cores are arranged on a circular path on a substrate and disposed opposite with each other with respect to a center of the circular path.

Systems, methods and computer readable media relating to a neuro-thermodynamic computers configured to train a learning model based on values representing gradient terms stored in position degrees of freedom of relay oscillators are described. An energy-based model comprising oscillators representing neurons and oscillators representing synapse values may be trained using gradient terms obtained in an analogue way. The gradient terms may be stored on respective relay oscillators and gradient terms may be combined with other gradient terms. Oscillators representing synapse parameters may be updated based on one or more gradient terms. In some embodiments, the training protocol is implemented in a fully analogue way. In some embodiments, measurements of relay oscillators are performed and stored in a classical computing device for post-processing.

A synchronization detection device includes: a pseudo-vorticity matrix calculation unit that inputs time evolution information of phases from an oscillator system including a finite number of oscillators and calculates a matrix having elements each of which is a discretized value of a phase difference obtained by two of the oscillators by time evolution; a synchronization graph generation unit that generates a synchronization graph that visualizes two-point synchronization with a graph representation; a partial synchronization set detection unit that detects a plurality of subsets of the oscillators having no common portion and partially synchronized in a set of a finite number of the oscillators in the synchronization graph; and a synchronization index calculation unit that generates an index characterizing partial synchronization of the oscillator system using a calculation result calculated by the pseudo-vorticity matrix calculation unit and a partial synchronization set detected by the partial synchronization set detection unit.

The invention relates to a high-repetition-frequency narrow-pulse-width 1645nm non-planar laser, which comprises three parts, namely a pump laser injection system, a seed laser injection system and a spatial four-mirror-cavity optical parametric oscillator system. The laser has the advantages that the beam quality is high, the injection energy of the pump light is adjustable, the injection light spots and the power density of the pump light and the seed light are adjustable, the service life of the nonlinear crystal is long, the tuning range is wide, and three wavelengths are output; the high-repetition-frequency large-pulse-energy high-beam-quality laser light source can be widely applied to a plurality of applications such as laser radar systems, remote sensing, telemetering and range finders, and is an important laser light source.

The invention discloses a piecewise B-spline wavelet periodic response calculation method for a collision vibration system, which comprises the following steps: (1) establishing a dynamic equation for wavelet discretization, discretizing a dynamic control equation of a collision-vibration system by using a 4-order B-spline wavelet basis function, and establishing a nonlinear algebraic equation set about a wavelet coefficient; (2) carrying out segmented iterative solution on the time domain, dividing the whole time domain into a plurality of sub-time periods which are connected in sequence, and carrying out iterative solution on the nonlinear algebraic equation set in each sub-time period to obtain a global wavelet coefficient; and (3) establishing periodic response reconstruction and analysis, reconstructing displacement, speed and acceleration response of the system based on the wavelet coefficient, and judging periodic response characteristics through judgment conditions. The invention aims to provide a method for calculating the periodic response of a collision-vibration system directly, accurately and efficiently based on a segmented 4-order B-spline wavelet technology.

Systems, methods and computer readable media relating to a neuro-thermodynamic computers configured to train a learning model based on values representing gradient terms stored in position degrees of freedom of relay oscillators are described. An energy-based model comprising oscillators representing neurons and oscillators representing synapse values may be trained using gradient terms obtained in an analogue way. The gradient terms may be stored on respective relay oscillators and gradient terms may be combined with other gradient terms. Oscillators representing synapse parameters may be updated based on one or more gradient terms. In some embodiments, the training protocol is implemented in a fully analogue way. In some embodiments, measurements of relay oscillators are performed and stored in a classical computing device for post-processing.

The application discloses a kind of based on density peak clustering and poincare section vibrator system phase state discrimination method and system, constructs standard Duffing vibrator system, and determines the state of standard Duffing vibrator system;Then determine the poincare section corresponding to different states of standard Duffing vibrator system;Second, the poincare section corresponding to different states of standard Duffing vibrator system is input into density peak clustering algorithm, and density peak clustering algorithm outputs clustering center;Finally, according to the number of clustering center, determine the state of standard Duffing vibrator system.The application adopts the method that density peak clustering and poincare section are combined to determine the state of Duffing vibrator system, overcome the shortcoming that qualitative discrimination method is not high in accuracy and quantitative discrimination method is long in time, calculation is complicated, realize the state of fast and accurate judgment chaotic system.

The present application belongs to the technical field of electronic components and frequency control, and specifically relates to an anti-aging crystal oscillator system based on a neural network and a memristor. The present application uses the time series prediction capability of the neural network to provide algorithm support for the aging trend prediction of the crystal oscillator, predicts the aging trend through the neural network, realizes the leap from "lagging correction" to "feedforward compensation", and fundamentally eliminates compensation delay. In combination with the memristor, the present application has the characteristics of adjustable resistance state, non-volatile storage and low-power operation, and constructs an adaptive and highly reliable analog computing and storage integrated circuit. Finally, the precise prediction capability of the neural network and the storage-operation integrated characteristics of the memristor are deeply integrated, forming an integrated closed-loop solution for the aging prediction and active compensation of the crystal oscillator. The neural network algorithm can be solidified in the microcontroller, the memristor is compatible with the CMOS process, and the miniaturization and on-chip integration of the entire crystal oscillator system can be realized.

Aspects of the present disclosure provide an integrated circuit (IC). The IC includes oscillator systems, each configured to generate a respective oscillating signal. The IC includes signal paths, each signal path coupled to a respective one of the plurality of oscillator systems, a first signal path of the plurality of signal paths including a mixer and another signal path including an audio generator. The audio generator is configured to generate an audio signal based on the oscillating signal from the corresponding oscillator system. And a mixer coupled to the audio generator of the other signal path of the plurality of signal paths, and configured to generate a mixed signal for RSB calibration based on the audio signal from the audio generator of the other one of the plurality of signal paths and the oscillation signal from the oscillator system coupled to the first one of the plurality of signal paths.

The invention discloses a double-potential-well spring oscillator system experiment device and a double-potential-well spring oscillator system experiment method. An air cushion guide rail and a non-inertial reference system motion module are arranged on a horizontal bottom plate, a sliding block is installed on the air cushion guide rail in a sliding mode, an adjustable spring fixing support is arranged in the direction perpendicular to the air cushion guide rail, and the adjustable spring fixing support is connected with the air cushion guide rail through a horizontal limiting tension-compression spring module. A visual module is arranged on the adjustable spring fixing bracket; a digital display pull and push dynamometer is further arranged above the air cushion guide rail, and the detection end of the digital display pull and push dynamometer is connected with the sliding block; the method comprises a quasi-static mode, a dynamic mode and a chaos mode, movement between the adjustable spring fixing support and the sliding block is adjusted, different friction of the sliding block on the air cushion guide rail is adjusted, different experiment testing modes are generated, and experiment simulation is achieved. Various nonlinear dynamic phenomena of the spring oscillator in a double-potential-well system are comprehensively and accurately displayed, rich experiment contents and powerful tools are provided for college physics experiment teaching, and the method has wide application prospects.

In certain aspects, a voltage controlled oscillator (VCO), a system circuit, and a control method thereof are disclosed. The VCO includes a first oscillator circuit and a second oscillator circuit. The first oscillator circuit includes a first inductor. The second oscillator circuit includes a second inductor. The first inductor is embedded inside the second inductor so that a total mutual inductance between the first and second inductors is smaller than or equal to a predetermined threshold.

The invention belongs to the technical field of electronic elements and frequency control, and particularly relates to an anti-aging crystal oscillator system based on a neural network and a memristor. According to the method, algorithm support is provided for aging trend pre-judgment of the crystal oscillator by using the time sequence prediction capability of the neural network, the aging trend is predicted through the neural network, spanning from'lag correction 'to'feed-forward compensation' is realized, and compensation delay is eliminated fundamentally. In combination with the characteristics of resistance state adjustability, nonvolatile storage and low-power-consumption operation of the memristor, a self-adaptive and high-reliability analog calculation and storage integrated circuit is constructed; and finally, the accurate prediction capability of the neural network and the storage-operation integration characteristic of the memristor are deeply fused to form an integrated closed-loop solution for aging prediction and active compensation of the crystal oscillator. The neural network algorithm can be solidified in the microcontroller, the memristor is compatible with the CMOS technology, and miniaturization and on-chip integration of the whole crystal oscillator system are achieved.

In one example, an RF oscillator system includes a laser source configured to emit laser light, a housing, a crystalline microresonator disposed within the housing, and a photonic integrated circuit disposed within the housing, the photonic integrated circuit including an optical waveguide network and configured to generate a clock signal based on the laser light. The RF oscillator system may further include at least one photonic wirebond configured to couple the laser light between the optical waveguide network and the crystalline microresonator via evanescent coupling; laser control circuitry disposed within the housing and configured to lock a frequency of the laser light to a resonance of the microresonator to generate the clock signal; and a direct digital synthesizer disposed within the housing and configured to produce a tunable oscillator signal based on the clock signal.

A free space optical oscillator system for sensing perturbations in optical signals transmitted through a free space propagation region includes a laser diode which generates intensity-modulated optical signals. A first 50 / 50 directional coupler connected to the laser diode injects the intensity-modulated optical signals into an optical sensing path. A free space propagation region located between a first and second collimating lens generates phase shifts in the intensity-modulated optical signals upon detecting changes in a substance located within a sensing zone of the free space propagation region. A semiconductor optical amplifier (SOA) amplifies the phase shifted intensity-modulated optical signals. A phase shift loop, connected between a second 50 / 50 directional coupler and the first 50 / 50 directional coupler, inserts a fixed phase shift into the amplified phase shifted intensity-modulated optical signals through a piezoelectric (PZT) fiber stretcher. A measurement loop converts the phase-shifted amplified intensity-modulated optical signals to electrical signals using a photodetector.

This disclosure describes systems and methods for implementing a dual core voltage controlled oscillator (VCO). The dual core VCO may include a transformer structure having a planar circle geometry. The transformer structure may be divided into a first half and a second half. Each half of the transformer structure may include a first end and a second end. The dual-core VCO may include a first core and a second core. The first core may be coupled with the first end of the first half and the first end of the second half. The second core may be coupled with the second end of the first half and the second end of the second half. The transformer structure may be configured to reduce an effective inductance of the dual-core VCO by a first threshold while maintaining impedance within a second threshold.

The application discloses a kind of based on amplitude heterogeneity partial amplitude death implementation method.By constructing the Stuart-Landau coupled oscillation system model with the amplitude heterogeneity subject to uniform distribution, the conjugate average field coupling is introduced, combined with partial amplitude death steady-state analysis and its linear stability analysis, the continuous spectrum and discrete spectrum of coupled oscillator system are solved, the upper boundary of partial amplitude death boundary and the amplitude death proportion expression are determined.The influence of amplitude distribution parameters and coupling strength on partial amplitude death can be determined, and the partial amplitude death boundary line, death proportion and phase transition process can be identified.This method breaks through the limitations of traditional numerical simulation fitting, and the scheme is universal, which can meet the high-precision regulation and control requirements of complex coupled systems.It can provide reliable theoretical basis and technical support for the dynamic analysis, structure optimization and precise regulation and control of complex oscillation systems such as nonlinear systems, coupled oscillators, artificial neural networks and power systems.

A system of free running oscillators synchronized to the lowest frequency running one and following PVT variation generates a system clock. A method is particularly applicable to clock relatively small clock domains within a multi-core chip containing thousands of cores, and where the clock domain encompasses one or more cores and additional logic blocks. The resulting system clock is divided by 2k using latches or flip-flops to achieve a symmetric 50-50 duty cycle of the system clock. Further, such PVT insensitive system clock can be used as a reference for a PLL or DLL generated clock for the domain.

The invention discloses a circular single-layer vibration transmission sheet device, which belongs to the field of vibration transmission sheets, and comprises a flat sheet body, the flat sheet body comprises a central part, a peripheral part and a connecting support rod, the flat sheet body is of a circular structure, a plurality of discontinuous through holes or through grooves are formed in the flat sheet body, the peripheral part is used for being connected with a body of a device to fix the vibration transmission sheet, and the connecting support rod is connected with the central part. The central part is used for being connected with a moving part of the vibrator or the actuator so as to fix the vibration transmission piece and the moving part, the connecting supporting rod is used for connecting the peripheral part and the central part, and when the moving part of the bone conduction vibrator or the actuator moves, the connecting supporting rod provides symmetrical elastic support so as to fix the vibration transmission piece and the moving part. When the moving part vibrates in the Z-axis direction, the moving part is kept balanced and stable, and the number of layers between the central part and the peripheral part in the radial direction is single-ring layers when viewed from the central part to the peripheral part of the plain film body in the radial direction.